When a waves passed from one medium into another, some of the wave is reflected off the boundary between the two media, and some is transmitted (and refracted)
4 of 11
What does that mean?
You can point a pulse of ultrasound at an object and wherever there are boundaries between one substance and another, some of the ultrasound gets reflected back.
5 of 11
How can you measure how far away the boundary is?
By using the time it takes for the reflections to reach a detector
6 of 11
How does ultrasound imaging work?
By using the time it takes for the reflections to reach a detector
7 of 11
What can you use to find boundaries?
Oscilloscope Traces
8 of 11
What does the Oscilloscope Trace show?
An ultrasound pulse reflecting off two separate boundaries.
9 of 11
What is the Formula for finding the distance between the boundaries?
D(distance) = S(speed)X T(time)
10 of 11
WHat do you need to make sure to do when using the formula?
Divide it by 2 as the wave has travelled there and back again.
Comments
No comments have yet been made